abs(2-x)-4≤5-abs(1+3x)-2
    abs(2x+1)>4
    sqrt(3-absx)/sqrt(abs(2x+1)-4)
    1≤abs2x-3<5
    4x+5<2（x+1）
    9x^(2)-12x+4>0
    2x^(2)-5x+7<0
    x-x*0.065=35966
    x^2-8*x+4>0
    x^2-8*x+7>0
    6+4（2m+1）≥20
    36-4（2m+1）≥0
    6a+9(2a+1)≤1929
    7x+（10-x）≤26 120x+100（10-x）≥1020
    70x+100(50-x)≤4100
    0.5714X+2.7143>15
    3x-1/x+2≥1
    2x^(2)－x<4
    x^2-x-30>0
    x^(2)

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